Zak, D. (2001). Programming with Microsoft Visual Basic 6.0 (enhanced ed.). Course Technology Publishers.
Lua i Stíl Chicago (17ú heag.)Zak, Diane. Programming with Microsoft Visual Basic 6.0. enhanced ed. Australia: Course Technology Publishers, 2001.
Lua MLA (9ú heag.)Zak, Diane. Programming with Microsoft Visual Basic 6.0. enhanced ed. Course Technology Publishers, 2001.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.